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Related Concept Videos

Energy Stored in a Capacitor01:12

Energy Stored in a Capacitor

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When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
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Energy Stored in Capacitors01:10

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A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
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MOS Capacitor01:25

MOS Capacitor

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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
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Capacitors and Capacitance01:18

Capacitors and Capacitance

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A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
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Equivalent Capacitance01:19

Equivalent Capacitance

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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
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Equivalent Capacitance01:19

Equivalent Capacitance

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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

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High-performance, stretchable, wire-shaped supercapacitors.

Tao Chen1, Rui Hao, Huisheng Peng

  • 1Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 (USA).

Angewandte Chemie (International Ed. in English)
|November 19, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed highly conductive and stretchable electrodes using carbon nanotube (CNT) films on elastic wires. These novel wire-shaped supercapacitors offer exceptional elasticity and performance for advanced electronic applications.

Keywords:
conductive materialsnanotubespolymersscanning probe microscopywires

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing stretchable and conductive materials is crucial for next-generation electronics.
  • Existing stretchable energy storage devices often compromise on performance or durability.

Purpose of the Study:

  • To create an extremely stretchable and highly conductive electrode material.
  • To fabricate high-performance, wire-shaped supercapacitors with enhanced elasticity.

Main Methods:

  • Wrapping continuous carbon nanotube (CNT) thin films around pre-stretched elastic wires.
  • Fabricating wire-shaped supercapacitors by twisting CNT-wrapped wires coated with poly(vinyl alcohol)/H3PO4 hydrogel.
  • Testing device performance under various strain levels and cycling conditions.

Main Results:

  • Achieved extremely high elasticity up to 350% strain.
  • Demonstrated high device capacitance of 30.7 F/g, doubling state-of-the-art performance at 100% strain.
  • Exhibited stable performance over hundreds of stretching cycles (0-200% strain).

Conclusions:

  • The developed CNT-based wire-shaped supercapacitors represent a significant advancement in stretchable electronics.
  • The wire-shaped design allows for modular integration, enabling tailored energy and power solutions.
  • These supercapacitors offer superior durability and performance compared to existing stretchable energy storage technologies.